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R30021 Cobalt vs. AWS E110C-K3

R30021 cobalt belongs to the cobalt alloys classification, while AWS E110C-K3 belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is AWS E110C-K3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 9.0
17
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 700
870
Tensile Strength: Yield (Proof), MPa 500
760

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1190
1410
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
48
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
9.0

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.0
1.7
Embodied Energy, MJ/kg 110
23
Embodied Water, L/kg 520
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
140
Resilience: Unit (Modulus of Resilience), kJ/m3 570
1550
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
31
Strength to Weight: Bending, points 21
26
Thermal Diffusivity, mm2/s 3.8
13
Thermal Shock Resistance, points 21
26

Alloy Composition


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Carbon (C), % 0.2 to 0.35
0 to 0.15
Chromium (Cr), % 26 to 29
0 to 0.15
Cobalt (Co), % 61.7 to 67.3
0
Copper (Cu), % 0
0 to 0.35
Iron (Fe), % 0 to 3.0
92.6 to 98.5
Manganese (Mn), % 0
0.75 to 2.3
Molybdenum (Mo), % 4.5 to 6.0
0.25 to 0.65
Nickel (Ni), % 2.0 to 3.0
0.5 to 2.5
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 1.5
0 to 0.8
Sulfur (S), % 0
0 to 0.025
Vanadium (V), % 0
0 to 0.030
Residuals, % 0
0 to 0.5